UTC

UTC adds .utc .local .isUTC APIs to parse or display in UTC.

var utc = require('dayjs/plugin/utc');
// import utc from 'dayjs/plugin/utc' // ES 2015

dayjs.extend(utc);

// default local time
dayjs().format(); //2019-03-06T17:11:55+08:00

// UTC mode
dayjs.utc().format(); // 2019-03-06T09:11:55Z

// convert local time to UTC time
dayjs().utc().format(); // 2019-03-06T09:11:55Z

// While in UTC mode, all display methods will display in UTC time instead of local time.
// And all getters and setters will internally use the Date#getUTC* and Date#setUTC* methods instead of the Date#get* and Date#set* methods.
dayjs.utc().isUTC(); // true
dayjs.utc().local().format(); //2019-03-06T17:11:55+08:00
dayjs.utc('2018-01-01', 'YYYY-MM-DD'); // with CustomParseFormat plugin

By default, Day.js parses and displays in local time.

If you want to parse or display in UTC, you can use dayjs.utc() instead of dayjs().

dayjs.utc dayjs.utc(dateType?: string | number | Date | Dayjs, format? string)

Returns a Dayjs object in UTC mode.

Use UTC time .utc()

Returns a cloned Dayjs object with a flag to use UTC time.

Use local time .local()

Returns a cloned Dayjs object with a flag to use local time.

Set UTC offset .utcOffset()

Returns a cloned Dayjs object with a new UTC offset.

isUTC mode .isUTC()

Returns a boolean indicating current Dayjs object is in UTC mode or not.